Lithium ion battery cell



FIG. 1 is a bottom perspective view of a lithium ion battery cell, showing my new design;

FIG. 2 is a top perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

The broken line in the figures depict portions of the article which form no part of the claimed design. 

CLAIM The ornamental design for a lithium ion battery cell, as shown and described. 